CVE-2026-22031

CVE-2026-22031 · Fastify Middie Middleware Path Bypass

Cette page présente des faits issus de sources publiques. Consultez l’avis original avant toute mise à jour.

@fastify/middie is the plugin that adds middleware support on steroids to Fastify. A security vulnerability exists in @fastify/middie prior to version 9.1.0 where middleware registered with a specific path prefix can be bypassed using URL-encoded characters (e.g., `/%61dmin` instead of `/admin`). While the middleware engine fails to match the encoded path and skips execution, the underlying Fastify router correctly decodes the path and matches the route handler, allowing attackers to access protected endpoints without the middleware constraints. Version 9.1.0 fixes the issue.

CVSS 8.4 · Élevée · EPSS 0,5% · Correctif disponible

Publication

2026-01-19T15:24:45.899Z

Mise à jour

2026-01-20T14:45:31.487Z

Pile logicielle: node

Vérifiez votre serveur →